Feed-rate indicator for electrochemical grinding
AssigneeInoue-Japax Research Incorporated
InventorKiyoshi Inoue
Life of this patent
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Abstract
An electrochemical grinding process is controlled by the use of a feed-rate indicating device which calculates and displaces the feed-rate (V) of a workpiece and a grinding wheel which are displaced relatively toward one another. The feed rate V is determined by the relationship V = A p/h + B/.sqroot.h where h is the cutting depth, p is the force for driving the wheel electrode in terms of nominal kilowatt power rating P per unit width w of the cutting area, and A and B are constants. These constants are determined between values of A of 150 to 156, exclusive, and values of B from 5.8 to 11.4, exclusive for current densities of 60 to 80 amperes cm.sup.2, respectively, by extrapolation.
Claims4
A device for automatically calculating the feed rate of a workpiece relative to an electrochemical grinding wheel in an electrochemical grinding operation comprising:
- a base plate provided with indicia of the feed rate V along one portion of a circle having a center and indicia of the cutting depth h along another portion of a circle having the same center as the first circle;
- a rotatable first member mounted on said plate and rotatable about said center, said first member carrying an index cooperating with said indicia of feed rate V and being provided with indicia of the drive force p per unit width of the cutting area;
- a second member rotatable about said center and provided with an index cooperating with said cutting depth indicia h;
- a third member displaceable on said base and provided with an index cooperating with the indicia p of said drive force;
- and mechanical means connecting said members for mutual and relative movement whereby said indexes cooperate with the respective indicia V, p and h in accordance with the relationship V = Ap/h + B/.sqroot.h, where A and B are constants.
A device for automatically calculating the feed rate of a workpiece relative to an electrochemical grinding wheel in an electrochemical grinding operation comprising:
- a base-plate member provided with first indicia along a portion of a circle having a center;
- a rotatable first member mounted on said base plate member and rotatable about said center, said first member carrying an index cooperating with said first indicia and being provided with second indicia, one of said base-plate and first members being provided with third indicia;
- a second member rotatable about said center and provided with an index cooperating with said third indicia;
- a third member displaceable on said base and provided with an index cooperating with the second indicia, one of said indicia being the feed rate V, another of said indicia being the cutting depth h, and the remaining indicia being the drive force p per unit width of the cutting area;
- and
- mechanical means connecting said first, second and third members for mutual and relative movement whereby said indexes cooperate with the respective indicia V, p and h in accordance with the relationship V = Ap/h + B/.sqroot.h where A and B are constants.
Dependencies are inferred from the claim text.